"Third brush" nut size?

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Model T Ford Forum: Forum 2012: "Third brush" nut size?
Top of pagePrevious messageNext messageBottom of page Link to this message  By Robert E.(Bob) Blackbourn. Gautier, MS. on Monday, January 16, 2012 - 03:33 pm:

Before I bend up an otherwise good wrench, can someone verify the size of the nut on the generator third brush holder? It looks like 5/16, but sometimes I don't look so good! :-)

Thanks,
Bob


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ron Patterson-Nicholasville, Kentucky on Monday, January 16, 2012 - 03:35 pm:

Bob
5/16 is correct.
FunProjects sells a reproduction of the special Ford wrench used for this purpose.
Ron the Coilman


Top of pagePrevious messageNext messageBottom of page Link to this message  By Robert E.(Bob) Blackbourn. Gautier, MS. on Monday, January 16, 2012 - 03:42 pm:

Thanks Ron. Boy that was quick :-)

Bob


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ron Patterson-Nicholasville, Kentucky on Monday, January 16, 2012 - 05:48 pm:

5-Z-806 Generator third brush and terminal bolt wrench
Ron the Coilman


Top of pagePrevious messageNext messageBottom of page Link to this message  By jack daron-Brownsburg,In. on Monday, January 16, 2012 - 11:07 pm:

You guys have it lucky. Before John started making those,originals were bringing in the $60-75 range. Now they are only about $10.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Scott Conger on Tuesday, January 17, 2012 - 06:04 am:

That nut is a special size relative to the thread. Don't lose it or the replacement nut will not work with the wrench.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Anthonie Boer on Tuesday, January 17, 2012 - 06:52 am:

Robert : you can bent a 5/16 wrench and tape it so you don't have problems with sparking when you change the charging while the gen. is turning.
830R
Toon


Top of pagePrevious messageNext messageBottom of page Link to this message  By Robert E.(Bob) Blackbourn. Gautier, MS. on Tuesday, January 17, 2012 - 11:16 am:

Yeah, I bent one to fit. Didn't tape it, just used the "set and try" method. Slower but safer. Turns out the nut was loose anyway. That explains why the brush holder had moved to the "maximum charge" position. It is now almost to the minimum position and charging about 6 amps.

Thanks all,
Bob

Gen Wrench


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ron Patterson-Nicholasville, Kentucky on Tuesday, January 17, 2012 - 11:28 am:

The Model T generator third brush clamp bolt nut is T-6728 and the same as the lock nut on top a Model T coil.
It is #10, 32TPI, 5/16 across the flats, chamfered.
This excludes the very early third brush that is entirely different as shown in the attached photos.
1
3
Ron Patterson


Top of pagePrevious messageNext messageBottom of page Link to this message  By Robert E.(Bob) Blackbourn. Gautier, MS. on Tuesday, January 17, 2012 - 11:49 am:

Looks like the early ones would be more difficult set in the car. Are the brush holders interchangeable?
Just curious:-)
Bob


Top of pagePrevious messageNext messageBottom of page Link to this message  By Ron Patterson-Nicholasville, Kentucky on Tuesday, January 17, 2012 - 12:00 pm:

Bob
They are more difficult to adjust. The later brushplate is interchangeable. In 15 years of rebuilding Model T generators I have only seen a few of these early ones. Reproduction brushplate insulators are not available for this unit.
Ron the Coilman


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